What minimum socket size should I select for the UDP socket

What minimum Sn_RXBUF_SIZE and Sn_TXBUF_SIZE should I select for the UDP socket used for Wake Up on LAN?

The magic packet is a broadcast frame containing anywhere within its payload 6 bytes of all 255 (FF FF FF FF FF FF in hexadecimal), followed by sixteen repetitions of the target computer’s 48-bit MAC address, for a total of 102 bytes but the size of the buffer of the W5500 can be set in steps of 1K then the minimum size for this use remains 1K.


As usual in receiving the first 8 bytes of the buffer are:
4 the ip address of the sender
2 port of the sender
2 the number of received bytes number to process